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-rw-r--r--drivers/i2c/Kconfig17
-rw-r--r--drivers/i2c/busses/Kconfig18
-rw-r--r--drivers/i2c/busses/i2c-designware-core.c2
-rw-r--r--drivers/i2c/busses/i2c-i801.c185
-rw-r--r--drivers/i2c/busses/i2c-parport.c2
-rw-r--r--drivers/i2c/busses/i2c-piix4.c1
-rw-r--r--drivers/i2c/busses/i2c-viapro.c3
-rw-r--r--drivers/i2c/busses/scx200_acb.c24
-rw-r--r--drivers/i2c/busses/scx200_i2c.c15
-rw-r--r--drivers/i2c/i2c-core.c16
-rw-r--r--drivers/i2c/i2c-mux.c22
-rw-r--r--drivers/i2c/i2c-smbus.c11
-rw-r--r--drivers/i2c/muxes/i2c-mux-gpio.c56
-rw-r--r--drivers/i2c/muxes/i2c-mux-pca9541.c2
-rw-r--r--drivers/i2c/muxes/i2c-mux-pca954x.c10
-rw-r--r--drivers/i2c/muxes/i2c-mux-pinctrl.c2
16 files changed, 315 insertions, 71 deletions
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 5a3bb3d738d8..2f8c76becc6b 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -4,7 +4,7 @@
menuconfig I2C
tristate "I2C support"
- depends on HAS_IOMEM
+ depends on !S390
select RT_MUTEXES
---help---
I2C (pronounce: I-squared-C) is a slow serial bus protocol used in
@@ -49,6 +49,7 @@ config I2C_CHARDEV
config I2C_MUX
tristate "I2C bus multiplexing support"
+ depends on HAS_IOMEM
help
Say Y here if you want the I2C core to support the ability to
handle multiplexed I2C bus topologies, by presenting each
@@ -86,6 +87,19 @@ config I2C_SMBUS
source drivers/i2c/algos/Kconfig
source drivers/i2c/busses/Kconfig
+config I2C_STUB
+ tristate "I2C/SMBus Test Stub"
+ depends on EXPERIMENTAL && m
+ default 'n'
+ help
+ This module may be useful to developers of SMBus client drivers,
+ especially for certain kinds of sensor chips.
+
+ If you do build this module, be sure to read the notes and warnings
+ in <file:Documentation/i2c/i2c-stub>.
+
+ If you don't know what to do here, definitely say N.
+
config I2C_DEBUG_CORE
bool "I2C Core debugging messages"
help
@@ -103,6 +117,7 @@ config I2C_DEBUG_ALGO
config I2C_DEBUG_BUS
bool "I2C Bus debugging messages"
+ depends on HAS_IOMEM
help
Say Y here if you want the I2C bus drivers to produce a bunch of
debug messages to the system log. Select this if you are having
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index 42d9fdd63de0..ff01c389e2da 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -3,6 +3,7 @@
#
menu "I2C Hardware Bus support"
+ depends on HAS_IOMEM
comment "PC SMBus host controller drivers"
depends on PCI
@@ -80,6 +81,7 @@ config I2C_I801
tristate "Intel 82801 (ICH/PCH)"
depends on PCI
select CHECK_SIGNATURE if X86 && DMI
+ select GPIOLIB if I2C_MUX
help
If you say yes to this option, support will be included for the Intel
801 family of mainboard I2C interfaces. Specifically, the following
@@ -224,7 +226,7 @@ config I2C_VIA
will be called i2c-via.
config I2C_VIAPRO
- tristate "VIA VT82C596/82C686/82xx and CX700/VX8xx"
+ tristate "VIA VT82C596/82C686/82xx and CX700/VX8xx/VX900"
depends on PCI
help
If you say yes to this option, support will be included for the VIA
@@ -240,6 +242,7 @@ config I2C_VIAPRO
CX700
VX800/VX820
VX855/VX875
+ VX900
This driver can also be built as a module. If so, the module
will be called i2c-viapro.
@@ -849,19 +852,6 @@ config I2C_SIBYTE
help
Supports the SiByte SOC on-chip I2C interfaces (2 channels).
-config I2C_STUB
- tristate "I2C/SMBus Test Stub"
- depends on EXPERIMENTAL && m
- default 'n'
- help
- This module may be useful to developers of SMBus client drivers,
- especially for certain kinds of sensor chips.
-
- If you do build this module, be sure to read the notes and warnings
- in <file:Documentation/i2c/i2c-stub>.
-
- If you don't know what to do here, definitely say N.
-
config SCx200_I2C
tristate "NatSemi SCx200 I2C using GPIO pins (DEPRECATED)"
depends on SCx200_GPIO
diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index 7b8ebbefb581..cbba7db9ad59 100644
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -370,7 +370,7 @@ static void i2c_dw_xfer_init(struct dw_i2c_dev *dev)
* messages into the tx buffer. Even if the size of i2c_msg data is
* longer than the size of the tx buffer, it handles everything.
*/
-void
+static void
i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
{
struct i2c_msg *msgs = dev->msgs;
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 33e9b0c09af2..37793156bd93 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -80,6 +80,13 @@
#include <linux/dmi.h>
#include <linux/slab.h>
#include <linux/wait.h>
+#include <linux/err.h>
+
+#if defined CONFIG_I2C_MUX || defined CONFIG_I2C_MUX_MODULE
+#include <linux/gpio.h>
+#include <linux/i2c-mux-gpio.h>
+#include <linux/platform_device.h>
+#endif
/* I801 SMBus address offsets */
#define SMBHSTSTS(p) (0 + (p)->smba)
@@ -158,6 +165,15 @@
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_SMBUS 0x8c22
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_SMBUS 0x9c22
+struct i801_mux_config {
+ char *gpio_chip;
+ unsigned values[3];
+ int n_values;
+ unsigned classes[3];
+ unsigned gpios[2]; /* Relative to gpio_chip->base */
+ int n_gpios;
+};
+
struct i801_priv {
struct i2c_adapter adapter;
unsigned long smba;
@@ -175,6 +191,11 @@ struct i801_priv {
int count;
int len;
u8 *data;
+
+#if defined CONFIG_I2C_MUX || defined CONFIG_I2C_MUX_MODULE
+ const struct i801_mux_config *mux_drvdata;
+ struct platform_device *mux_pdev;
+#endif
};
static struct pci_driver i801_driver;
@@ -900,6 +921,165 @@ static void __init input_apanel_init(void) {}
static void __devinit i801_probe_optional_slaves(struct i801_priv *priv) {}
#endif /* CONFIG_X86 && CONFIG_DMI */
+#if defined CONFIG_I2C_MUX || defined CONFIG_I2C_MUX_MODULE
+static struct i801_mux_config i801_mux_config_asus_z8_d12 = {
+ .gpio_chip = "gpio_ich",
+ .values = { 0x02, 0x03 },
+ .n_values = 2,
+ .classes = { I2C_CLASS_SPD, I2C_CLASS_SPD },
+ .gpios = { 52, 53 },
+ .n_gpios = 2,
+};
+
+static struct i801_mux_config i801_mux_config_asus_z8_d18 = {
+ .gpio_chip = "gpio_ich",
+ .values = { 0x02, 0x03, 0x01 },
+ .n_values = 3,
+ .classes = { I2C_CLASS_SPD, I2C_CLASS_SPD, I2C_CLASS_SPD },
+ .gpios = { 52, 53 },
+ .n_gpios = 2,
+};
+
+static struct dmi_system_id __devinitdata mux_dmi_table[] = {
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8NA-D6(C)"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8P(N)E-D12(X)"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8NH-D12"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8PH-D12/IFB"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8NR-D12"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8P(N)H-D12"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8PG-D18"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d18,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8PE-D18"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d18,
+ },
+ {
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
+ DMI_MATCH(DMI_BOARD_NAME, "Z8PS-D12"),
+ },
+ .driver_data = &i801_mux_config_asus_z8_d12,
+ },
+ { }
+};
+
+/* Setup multiplexing if needed */
+static int __devinit i801_add_mux(struct i801_priv *priv)
+{
+ struct device *dev = &priv->adapter.dev;
+ const struct i801_mux_config *mux_config;
+ struct i2c_mux_gpio_platform_data gpio_data;
+ int err;
+
+ if (!priv->mux_drvdata)
+ return 0;
+ mux_config = priv->mux_drvdata;
+
+ /* Prepare the platform data */
+ memset(&gpio_data, 0, sizeof(struct i2c_mux_gpio_platform_data));
+ gpio_data.parent = priv->adapter.nr;
+ gpio_data.values = mux_config->values;
+ gpio_data.n_values = mux_config->n_values;
+ gpio_data.classes = mux_config->classes;
+ gpio_data.gpio_chip = mux_config->gpio_chip;
+ gpio_data.gpios = mux_config->gpios;
+ gpio_data.n_gpios = mux_config->n_gpios;
+ gpio_data.idle = I2C_MUX_GPIO_NO_IDLE;
+
+ /* Register the mux device */
+ priv->mux_pdev = platform_device_register_data(dev, "i2c-mux-gpio",
+ PLATFORM_DEVID_AUTO, &gpio_data,
+ sizeof(struct i2c_mux_gpio_platform_data));
+ if (IS_ERR(priv->mux_pdev)) {
+ err = PTR_ERR(priv->mux_pdev);
+ priv->mux_pdev = NULL;
+ dev_err(dev, "Failed to register i2c-mux-gpio device\n");
+ return err;
+ }
+
+ return 0;
+}
+
+static void __devexit i801_del_mux(struct i801_priv *priv)
+{
+ if (priv->mux_pdev)
+ platform_device_unregister(priv->mux_pdev);
+}
+
+static unsigned int __devinit i801_get_adapter_class(struct i801_priv *priv)
+{
+ const struct dmi_system_id *id;
+ const struct i801_mux_config *mux_config;
+ unsigned int class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+ int i;
+
+ id = dmi_first_match(mux_dmi_table);
+ if (id) {
+ /* Remove from branch classes from trunk */
+ mux_config = id->driver_data;
+ for (i = 0; i < mux_config->n_values; i++)
+ class &= ~mux_config->classes[i];
+
+ /* Remember for later */
+ priv->mux_drvdata = mux_config;
+ }
+
+ return class;
+}
+#else
+static inline int i801_add_mux(struct i801_priv *priv) { return 0; }
+static inline void i801_del_mux(struct i801_priv *priv) { }
+
+static inline unsigned int i801_get_adapter_class(struct i801_priv *priv)
+{
+ return I2C_CLASS_HWMON | I2C_CLASS_SPD;
+}
+#endif
+
static int __devinit i801_probe(struct pci_dev *dev,
const struct pci_device_id *id)
{
@@ -913,7 +1093,7 @@ static int __devinit i801_probe(struct pci_dev *dev,
i2c_set_adapdata(&priv->adapter, priv);
priv->adapter.owner = THIS_MODULE;
- priv->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
+ priv->adapter.class = i801_get_adapter_class(priv);
priv->adapter.algo = &smbus_algorithm;
priv->pci_dev = dev;
@@ -1033,6 +1213,8 @@ static int __devinit i801_probe(struct pci_dev *dev,
}
i801_probe_optional_slaves(priv);
+ /* We ignore errors - multiplexing is optional */
+ i801_add_mux(priv);
pci_set_drvdata(dev, priv);
@@ -1052,6 +1234,7 @@ static void __devexit i801_remove(struct pci_dev *dev)
{
struct i801_priv *priv = pci_get_drvdata(dev);
+ i801_del_mux(priv);
i2c_del_adapter(&priv->adapter);
pci_write_config_byte(dev, SMBHSTCFG, priv->original_hstcfg);
diff --git a/drivers/i2c/busses/i2c-parport.c b/drivers/i2c/busses/i2c-parport.c
index 24565687ac9b..81d887869620 100644
--- a/drivers/i2c/busses/i2c-parport.c
+++ b/drivers/i2c/busses/i2c-parport.c
@@ -151,7 +151,7 @@ static const struct i2c_algo_bit_data parport_algo_data = {
/* ----- I2c and parallel port call-back functions and structures --------- */
-void i2c_parport_irq(void *data)
+static void i2c_parport_irq(void *data)
{
struct i2c_par *adapter = data;
struct i2c_client *ara = adapter->ara;
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index ef511df2c965..8bbd6ece7c41 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -37,6 +37,7 @@
#include <linux/stddef.h>
#include <linux/ioport.h>
#include <linux/i2c.h>
+#include <linux/slab.h>
#include <linux/init.h>
#include <linux/dmi.h>
#include <linux/acpi.h>
diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index 333011c83d52..271c9a2b0fd7 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -401,6 +401,7 @@ found:
case PCI_DEVICE_ID_VIA_CX700:
case PCI_DEVICE_ID_VIA_VX800:
case PCI_DEVICE_ID_VIA_VX855:
+ case PCI_DEVICE_ID_VIA_VX900:
case PCI_DEVICE_ID_VIA_8251:
case PCI_DEVICE_ID_VIA_8237:
case PCI_DEVICE_ID_VIA_8237A:
@@ -470,6 +471,8 @@ static DEFINE_PCI_DEVICE_TABLE(vt596_ids) = {
.driver_data = SMBBA3 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX855),
.driver_data = SMBBA3 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX900),
+ .driver_data = SMBBA3 },
{ 0, }
};
diff --git a/drivers/i2c/busses/scx200_acb.c b/drivers/i2c/busses/scx200_acb.c
index 2eacb7784d56..08aab57337dd 100644
--- a/drivers/i2c/busses/scx200_acb.c
+++ b/drivers/i2c/busses/scx200_acb.c
@@ -23,6 +23,8 @@
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
@@ -37,8 +39,6 @@
#include <linux/scx200.h>
-#define NAME "scx200_acb"
-
MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
MODULE_DESCRIPTION("NatSemi SCx200 ACCESS.bus Driver");
MODULE_ALIAS("platform:cs5535-smb");
@@ -398,7 +398,7 @@ static __devinit int scx200_acb_probe(struct scx200_acb_iface *iface)
outb(0x70, ACBCTL2);
if (inb(ACBCTL2) != 0x70) {
- pr_debug(NAME ": ACBCTL2 readback failed\n");
+ pr_debug("ACBCTL2 readback failed\n");
return -ENXIO;
}
@@ -406,8 +406,7 @@ static __devinit int scx200_acb_probe(struct scx200_acb_iface *iface)
val = inb(ACBCTL1);
if (val) {
- pr_debug(NAME ": disabled, but ACBCTL1=0x%02x\n",
- val);
+ pr_debug("disabled, but ACBCTL1=0x%02x\n", val);
return -ENXIO;
}
@@ -417,8 +416,8 @@ static __devinit int scx200_acb_probe(struct scx200_acb_iface *iface)
val = inb(ACBCTL1);
if ((val & ACBCTL1_NMINTE) != ACBCTL1_NMINTE) {
- pr_debug(NAME ": enabled, but NMINTE won't be set, "
- "ACBCTL1=0x%02x\n", val);
+ pr_debug("enabled, but NMINTE won't be set, ACBCTL1=0x%02x\n",
+ val);
return -ENXIO;
}
@@ -433,7 +432,7 @@ static __devinit struct scx200_acb_iface *scx200_create_iface(const char *text,
iface = kzalloc(sizeof(*iface), GFP_KERNEL);
if (!iface) {
- printk(KERN_ERR NAME ": can't allocate memory\n");
+ pr_err("can't allocate memory\n");
return NULL;
}
@@ -459,14 +458,14 @@ static int __devinit scx200_acb_create(struct scx200_acb_iface *iface)
rc = scx200_acb_probe(iface);
if (rc) {
- printk(KERN_WARNING NAME ": probe failed\n");
+ pr_warn("probe failed\n");
return rc;
}
scx200_acb_reset(iface);
if (i2c_add_adapter(adapter) < 0) {
- printk(KERN_ERR NAME ": failed to register\n");
+ pr_err("failed to register\n");
return -ENODEV;
}
@@ -493,8 +492,7 @@ static struct scx200_acb_iface * __devinit scx200_create_dev(const char *text,
return NULL;
if (!request_region(base, 8, iface->adapter.name)) {
- printk(KERN_ERR NAME ": can't allocate io 0x%lx-0x%lx\n",
- base, base + 8 - 1);
+ pr_err("can't allocate io 0x%lx-0x%lx\n", base, base + 8 - 1);
goto errout_free;
}
@@ -583,7 +581,7 @@ static __init void scx200_scan_isa(void)
static int __init scx200_acb_init(void)
{
- pr_debug(NAME ": NatSemi SCx200 ACCESS.bus Driver\n");
+ pr_debug("NatSemi SCx200 ACCESS.bus Driver\n");
/* First scan for ISA-based devices */
scx200_scan_isa(); /* XXX: should we care about errors? */
diff --git a/drivers/i2c/busses/scx200_i2c.c b/drivers/i2c/busses/scx200_i2c.c
index 7ee0d502ceab..ae1258b95d60 100644
--- a/drivers/i2c/busses/scx200_i2c.c
+++ b/drivers/i2c/busses/scx200_i2c.c
@@ -21,6 +21,8 @@
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/kernel.h>
@@ -31,8 +33,6 @@
#include <linux/scx200_gpio.h>
-#define NAME "scx200_i2c"
-
MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
MODULE_DESCRIPTION("NatSemi SCx200 I2C Driver");
MODULE_LICENSE("GPL");
@@ -88,17 +88,17 @@ static struct i2c_adapter scx200_i2c_ops = {
static int scx200_i2c_init(void)
{
- pr_debug(NAME ": NatSemi SCx200 I2C Driver\n");
+ pr_debug("NatSemi SCx200 I2C Driver\n");
if (!scx200_gpio_present()) {
- printk(KERN_ERR NAME ": no SCx200 gpio pins available\n");
+ pr_err("no SCx200 gpio pins available\n");
return -ENODEV;
}
- pr_debug(NAME ": SCL=GPIO%02u, SDA=GPIO%02u\n", scl, sda);
+ pr_debug("SCL=GPIO%02u, SDA=GPIO%02u\n", scl, sda);
if (scl == -1 || sda == -1 || scl == sda) {
- printk(KERN_ERR NAME ": scl and sda must be specified\n");
+ pr_err("scl and sda must be specified\n");
return -EINVAL;
}
@@ -107,8 +107,7 @@ static int scx200_i2c_init(void)
scx200_gpio_configure(sda, ~2, 5);
if (i2c_bit_add_bus(&scx200_i2c_ops) < 0) {
- printk(KERN_ERR NAME ": adapter %s registration failed\n",
- scx200_i2c_ops.name);
+ pr_err("adapter %s registration failed\n", scx200_i2c_ops.name);
return -ENODEV;
}
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 2421d95130d4..a7edf987a339 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1989,12 +1989,22 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr,
unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX+3];
unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX+2];
int num = read_write == I2C_SMBUS_READ ? 2 : 1;
- struct i2c_msg msg[2] = { { addr, flags, 1, msgbuf0 },
- { addr, flags | I2C_M_RD, 0, msgbuf1 }
- };
int i;
u8 partial_pec = 0;
int status;
+ struct i2c_msg msg[2] = {
+ {
+ .addr = addr,
+ .flags = flags,
+ .len = 1,
+ .buf = msgbuf0,
+ }, {
+ .addr = addr,
+ .flags = flags | I2C_M_RD,
+ .len = 0,
+ .buf = msgbuf1,
+ },
+ };
msgbuf0[0] = command;
switch (size) {
diff --git a/drivers/i2c/i2c-mux.c b/drivers/i2c/i2c-mux.c
index 1038c381aea5..d94e0ce78277 100644
--- a/drivers/i2c/i2c-mux.c
+++ b/drivers/i2c/i2c-mux.c
@@ -88,9 +88,23 @@ static u32 i2c_mux_functionality(struct i2c_adapter *adap)
return parent->algo->functionality(parent);
}
+/* Return all parent classes, merged */
+static unsigned int i2c_mux_parent_classes(struct i2c_adapter *parent)
+{
+ unsigned int class = 0;
+
+ do {
+ class |= parent->class;
+ parent = i2c_parent_is_i2c_adapter(parent);
+ } while (parent);
+
+ return class;
+}
+
struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
struct device *mux_dev,
void *mux_priv, u32 force_nr, u32 chan_id,
+ unsigned int class,
int (*select) (struct i2c_adapter *,
void *, u32),
int (*deselect) (struct i2c_adapter *,
@@ -127,6 +141,14 @@ struct i2c_adapter *i2c_add_mux_adapter(struct i2c_adapter *parent,
priv->adap.algo_data = priv;
priv->adap.dev.parent = &parent->dev;
+ /* Sanity check on class */
+ if (i2c_mux_parent_classes(parent) & class)
+ dev_err(&parent->dev,
+ "Segment %d behind mux can't share classes with ancestors\n",
+ chan_id);
+ else
+ priv->adap.class = class;
+
/*
* Try to populate the mux adapter's of_node, expands to
* nothing if !CONFIG_OF.
diff --git a/drivers/i2c/i2c-smbus.c b/drivers/i2c/i2c-smbus.c
index df3e0bf31eb3..92cdd2323b03 100644
--- a/drivers/i2c/i2c-smbus.c
+++ b/drivers/i2c/i2c-smbus.c
@@ -142,7 +142,8 @@ static int smbalert_probe(struct i2c_client *ara,
struct i2c_adapter *adapter = ara->adapter;
int res;
- alert = kzalloc(sizeof(struct i2c_smbus_alert), GFP_KERNEL);
+ alert = devm_kzalloc(&ara->dev, sizeof(struct i2c_smbus_alert),
+ GFP_KERNEL);
if (!alert)
return -ENOMEM;
@@ -154,10 +155,8 @@ static int smbalert_probe(struct i2c_client *ara,
if (setup->irq > 0) {
res = devm_request_irq(&ara->dev, setup->irq, smbalert_irq,
0, "smbus_alert", alert);
- if (res) {
- kfree(alert);
+ if (res)
return res;
- }
}
i2c_set_clientdata(ara, alert);
@@ -167,14 +166,12 @@ static int smbalert_probe(struct i2c_client *ara,
return 0;
}
-/* IRQ resource is managed so it is freed automatically */
+/* IRQ and memory resources are managed so they are freed automatically */
static int smbalert_remove(struct i2c_client *ara)
{
struct i2c_smbus_alert *alert = i2c_get_clientdata(ara);
cancel_work_sync(&alert->alert);
-
- kfree(alert);
return 0;
}
diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
index 68b1f8ec3436..566a6757a33d 100644
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -21,6 +21,7 @@ struct gpiomux {
struct i2c_adapter *parent;
struct i2c_adapter **adap; /* child busses */
struct i2c_mux_gpio_platform_data data;
+ unsigned gpio_base;
};
static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val)
@@ -28,7 +29,8 @@ static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val)
int i;
for (i = 0; i < mux->data.n_gpios; i++)
- gpio_set_value(mux->data.gpios[i], val & (1 << i));
+ gpio_set_value(mux->gpio_base + mux->data.gpios[i],
+ val & (1 << i));
}
static int i2c_mux_gpio_select(struct i2c_adapter *adap, void *data, u32 chan)
@@ -49,13 +51,19 @@ static int i2c_mux_gpio_deselect(struct i2c_adapter *adap, void *data, u32 chan)
return 0;
}
+static int __devinit match_gpio_chip_by_label(struct gpio_chip *chip,
+ void *data)
+{
+ return !strcmp(chip->label, data);
+}
+
static int __devinit i2c_mux_gpio_probe(struct platform_device *pdev)
{
struct gpiomux *mux;
struct i2c_mux_gpio_platform_data *pdata;
struct i2c_adapter *parent;
int (*deselect) (struct i2c_adapter *, void *, u32);
- unsigned initial_state;
+ unsigned initial_state, gpio_base;
int i, ret;
pdata = pdev->dev.platform_data;
@@ -64,6 +72,23 @@ static int __devinit i2c_mux_gpio_probe(struct platform_device *pdev)
return -ENODEV;
}
+ /*
+ * If a GPIO chip name is provided, the GPIO pin numbers provided are
+ * relative to its base GPIO number. Otherwise they are absolute.
+ */
+ if (pdata->gpio_chip) {
+ struct gpio_chip *gpio;
+
+ gpio = gpiochip_find(pdata->gpio_chip,
+ match_gpio_chip_by_label);
+ if (!gpio)
+ return -EPROBE_DEFER;
+
+ gpio_base = gpio->base;
+ } else {
+ gpio_base = 0;
+ }
+
parent = i2c_get_adapter(pdata->parent);
if (!parent) {
dev_err(&pdev->dev, "Parent adapter (%d) not found\n",
@@ -71,7 +96,7 @@ static int __devinit i2c_mux_gpio_probe(struct platform_device *pdev)
return -ENODEV;
}
- mux = kzalloc(sizeof(*mux), GFP_KERNEL);
+ mux = devm_kzalloc(&pdev->dev, sizeof(*mux), GFP_KERNEL);
if (!mux) {
ret = -ENOMEM;
goto alloc_failed;
@@ -79,11 +104,13 @@ static int __devinit i2c_mux_gpio_probe(struct platform_device *pdev)
mux->parent = parent;
mux->data = *pdata;
- mux->adap = kzalloc(sizeof(struct i2c_adapter *) * pdata->n_values,
- GFP_KERNEL);
+ mux->gpio_base = gpio_base;
+ mux->adap = devm_kzalloc(&pdev->dev,
+ sizeof(*mux->adap) * pdata->n_values,
+ GFP_KERNEL);
if (!mux->adap) {
ret = -ENOMEM;
- goto alloc_failed2;
+ goto alloc_failed;
}
if (pdata->idle != I2C_MUX_GPIO_NO_IDLE) {
@@ -95,17 +122,19 @@ static int __devinit i2c_mux_gpio_probe(struct platform_device *pdev)
}
for (i = 0; i < pdata->n_gpios; i++) {
- ret = gpio_request(pdata->gpios[i], "i2c-mux-gpio");
+ ret = gpio_request(gpio_base + pdata->gpios[i], "i2c-mux-gpio");
if (ret)
goto err_request_gpio;
- gpio_direction_output(pdata->gpios[i],
+ gpio_direction_output(gpio_base + pdata->gpios[i],
initial_state & (1 << i));
}
for (i = 0; i < pdata->n_values; i++) {
u32 nr = pdata->base_nr ? (pdata->base_nr + i) : 0;
+ unsigned int class = pdata->classes ? pdata->classes[i] : 0;
- mux->adap[i] = i2c_add_mux_adapter(parent, &pdev->dev, mux, nr, i,
+ mux->adap[i] = i2c_add_mux_adapter(parent, &pdev->dev, mux, nr,
+ i, class,
i2c_mux_gpio_select, deselect);
if (!mux->adap[i]) {
ret = -ENODEV;
@@ -127,10 +156,7 @@ add_adapter_failed:
i = pdata->n_gpios;
err_request_gpio:
for (; i > 0; i--)
- gpio_free(pdata->gpios[i - 1]);
- kfree(mux->adap);
-alloc_failed2:
- kfree(mux);
+ gpio_free(gpio_base + pdata->gpios[i - 1]);
alloc_failed:
i2c_put_adapter(parent);
@@ -146,12 +172,10 @@ static int __devexit i2c_mux_gpio_remove(struct platform_device *pdev)
i2c_del_mux_adapter(mux->adap[i]);
for (i = 0; i < mux->data.n_gpios; i++)
- gpio_free(mux->data.gpios[i]);
+ gpio_free(mux->gpio_base + mux->data.gpios[i]);
platform_set_drvdata(pdev, NULL);
i2c_put_adapter(mux->parent);
- kfree(mux->adap);
- kfree(mux);
return 0;
}
diff --git a/drivers/i2c/muxes/i2c-mux-pca9541.c b/drivers/i2c/muxes/i2c-mux-pca9541.c
index f8f72f39e0b5..f3b8f9a6a89b 100644
--- a/drivers/i2c/muxes/i2c-mux-pca9541.c
+++ b/drivers/i2c/muxes/i2c-mux-pca9541.c
@@ -354,7 +354,7 @@ static int pca9541_probe(struct i2c_client *client,
if (pdata)
force = pdata->modes[0].adap_id;
data->mux_adap = i2c_add_mux_adapter(adap, &client->dev, client,
- force, 0,
+ force, 0, 0,
pca9541_select_chan,
pca9541_release_chan);
diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c b/drivers/i2c/muxes/i2c-mux-pca954x.c
index f2dfe0d8fcce..8e4387235b69 100644
--- a/drivers/i2c/muxes/i2c-mux-pca954x.c
+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -186,7 +186,7 @@ static int pca954x_probe(struct i2c_client *client,
{
struct i2c_adapter *adap = to_i2c_adapter(client->dev.parent);
struct pca954x_platform_data *pdata = client->dev.platform_data;
- int num, force;
+ int num, force, class;
struct pca954x *data;
int ret = -ENODEV;
@@ -216,18 +216,20 @@ static int pca954x_probe(struct i2c_client *client,
/* Now create an adapter for each channel */
for (num = 0; num < chips[data->type].nchans; num++) {
force = 0; /* dynamic adap number */
+ class = 0; /* no class by default */
if (pdata) {
- if (num < pdata->num_modes)
+ if (num < pdata->num_modes) {
/* force static number */
force = pdata->modes[num].adap_id;
- else
+ class = pdata->modes[num].class;
+ } else
/* discard unconfigured channels */
break;
}
data->virt_adaps[num] =
i2c_add_mux_adapter(adap, &client->dev, client,
- force, num, pca954x_select_chan,
+ force, num, class, pca954x_select_chan,
(pdata && pdata->modes[num].deselect_on_exit)
? pca954x_deselect_mux : NULL);
diff --git a/drivers/i2c/muxes/i2c-mux-pinctrl.c b/drivers/i2c/muxes/i2c-mux-pinctrl.c
index 46a669763476..5f097f309b9f 100644
--- a/drivers/i2c/muxes/i2c-mux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-mux-pinctrl.c
@@ -221,7 +221,7 @@ static int __devinit i2c_mux_pinctrl_probe(struct platform_device *pdev)
(mux->pdata->base_bus_num + i) : 0;
mux->busses[i] = i2c_add_mux_adapter(mux->parent, &pdev->dev,
- mux, bus, i,
+ mux, bus, i, 0,
i2c_mux_pinctrl_select,
deselect);
if (!mux->busses[i]) {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 15:30:38 +0100